We observed that we have a lot of unprocessable mails since the Upgrade to 2.8.1
I talk about 10 Mails per day. It affects incoming and outgoing Mails.
The Problem is global that means in our case on one VM and on one physical Server.
I read this article :
It will not deliver the mails anymore.
Anybody know why since to upgrade the amount of unprocessable Mails increase?
Many thanks for any hint!